US1737137A

US1737137A - Centrifugal machine

Info

Publication number: US1737137A
Application number: US254437A
Authority: US
Inventors: Arthur U Ayres
Original assignee: Sharples Specialty Co
Current assignee: Sharples Specialty Co
Priority date: 1928-02-15
Filing date: 1928-02-15
Publication date: 1929-11-26
Anticipated expiration: 1946-11-26
Also published as: FR669488A

Description

Nov. 26, 1929. A. U.-AYRES CENTRIFUGAL MACHINE Filed Feb. 15. 1928 stance introduced into the bowl.

Patented llov. 26, 1929 NITED STATES PATENT} OF ARTHUR U. AY'BES, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE SHARPLES siencrnnrr coraranr, or PHILADELP nnriawann HIA, PENNSYLVANIA, A COMORATION CENTRIFUGAL MACHINE Application filed February 15, 1928. Serial 110. 1,437.

Tins invention relates to centrifugal machines and more especially to that type of centrifugal machine in which the bowl is suspended and rotated by an overhead spindle.

'When a centrifugal bowl so supported is rotated the lower end thereof tends to move in a planetransverse to the geometrical axis of the bowl.

in object of this invention is to provide novel and improved means, commonly called a drag assembly, whereby such lateral mo ion of the lower end of a centrifugal bowl o supported may be permitted but resisted vieldingly and limited and whereby subtances may be introduced to such a bowl, uch means having provision, if desired, for drainin substances flowing from the bowl after it ceases rotation and for draining the bowl enclosure or support.

in the practice of this invention a so-called drag acts upon the lower part of the bowl and preferably upon atubular boss or the like through which substances may be fed to the bowl. The drag includes a guiding member preferably composed of self-lubricating material that engages the bowl or the tubular boss and moves laterally with it but is held by spring pressure in frictional engagement with a surface or between surfaces substantially normal to the axis of rotation of the bowl, and the drag includes means for positively limiting the extent of the lateral movement of the guiding member that is so resisted frictionally. A vention is that the assembly in which the guiding member is mounted, commonly called the drag assembly, includes a nozzle'discharging a substance into the tubular boss of the bowl and so positioned as to avoid the spilling upon the guiding member of a sub- A further feature of this invention is that the drag assembly includes an inlet leading to the nozale and adjustable as to position in order to connect up properly with supply-pipes com ing from difierent directions, and includes drain openings for the discharge of the contents of the bowl after it stops rotating and for the discharge of substances collecting in further feature of this inthe enclosure surrounding the bowl, such openings being so arranged that their point of discharge is not greatly varied by adjustment of the position of the inlet.

Gther objects, novel features and advant ages of the invention will be apparent from the following specification and the accompanying drawings wherein,

Fig. 1 is a broken vertical sectional view taken through the bottom of a centrifugal machine embodying the invention; and

- Fig. 2 is a sectional V1BVV; on line 2-2 of Fig. 1.

The mechanism illustrated in the drawing comprises casing having bottom aperture 11 in which is threaded annular plug 12 provided with flange 18 which engages'casing 10.

A. shell 14 having an inturned flange 15 is threaded on a tubular projection 16 arising from the top of the plug 12. Within the shell is arranged a guiding member 17, which is preferably of some self-lubricating material or wood impregnated with a lubricant. This guiding member is mounted in a metal ferrule 18 having an aperture in the bottom thereof. A helical spring 19 has its lower end resting on a shoulder provided within the tubular projection 16 and its upper end engages a,

washer 20, which in turn engages the bottom of the ferrule 18. The guiding member 17 is pressed upwardly by the spring 19 into contact with the flange 15. The dimensions of the ferrule 18 are suchthat it is allowed a limited lateral play within the shell.

A bowl 21 suspended and-rotated by an overhead spindle (not shown) has acap 22 threaded on its lower end. This cap is provided with a tubular boss 23 which engages within the guiding member 17, and extends through the bottom of the ferrule 18 and the washer 19. The boss 23 may be inserted in' or removed from the guiding member by moving the bowl 21 vertically, or the drag may be removed from the casing while the boss and bowl are suspended in position in shoulder provided on the inner end of the connector. The connector is provided with a'central passage 26 which terminates in a socket 27. A nozzle 28 is threaded into the inner end of the connector in communication with the conduit 26 and extends into the boss 23. The nozzle 28 is of less diameter than the interior of the boss 23, so that there is provided an annular space between the two, thus permitting lateral movement of the boss relative to the nozzle. A substantially annular chamber 29 in the connector 24 communicates with the space between the nozzle 28 and the inner surface of the plug 13. Drain Outlet 129 leads downwardly from chamber 29. I

Fluidis introduced into the bowl through a feed pipe (not shown), the end of which is threaded into the socket 27, and the fluid passes upwardly through the conduit 26 and nozzle 28 into the bowl 21. Chamber 29 and outlet 129 form a drain for fluid left in the bowl at the end of a run. Apertures 30 are provided in shell 16 so that any liquid collecting in the casing 10- may drain into chamber 29. 'By means of the drains thus provided, bowl drainage as well as leakage runs off freely without contaminating the boss or the guiding member and thereby causing bearing wear. The connector 24 may be positioned with the socket 27 facing any desired direction to accommodate feed pipes running to the centrifuge from various points, merely by loosening the collar 25 and rotating the connector about its axis, after which the collar is tightened.

The drag above described permits limited lateral movement of guiding member 17 unider'yielding frictional restraint and thus permits the bearing automatically to positlOIl'itSBlf coaxial with the axis of rotation of the bowl 21. The guiding member parts are protected against deterioration and wear since the guiding member automatically provides proper lubricant. Moreover. the drag said plug having a central feed conduit com' municating with said nozzle and an annular.

discharge conduit leading from the space between said'nozzle and said boss andopening to the exterior of said casing in the direction of the axis of said plug.

. 2. In a centrifugal machine, a casing having an aperture, an annular plug mounted in said aperture, :1 guide mounted on said plug for restrained lateral movement, a centrifugal bowl having a feed boss extending into said guide, a memberdetachably connected to said plug, said member having a- -central conduit terminating in a laterally exmay be readily removed and replaced and the feed nozzle may also be easilv and quickly removed and replaced without disturbing the guiding member. Asfthe nozzle 28 projects into the bowl, freshliquid is delivered'without anycontamination of the guiding member and free drainage is provided by the chamber 29 and outlet 129. The drainage outlet 129 is centrally arranged and drain-. age is discharged fromsubstantially the same point of the casing regardless of the arrange- 'ment of the connector 21 for the purpose of making pipe connections, and regardless'of the final position in which plug 12 comes to rest when screwed tightly into position I in the frame.

It is apparent, of course, that various modifications may be made in the above described mechanism without in any way departing tending socket, a nozzle carried by said member, said nozzle communicating with said conduit and extending into said boss, and means connecting said member to said plug and permitting adjustment thereof to vary the angular position of said socket. V

8. In a centrifugal machine, a centrifugal bowl having a feed boss, a casing provided with an aperture, and a drag assembly positioned in said aperture and comprising a nozzle in alinement with said feed boss and a guide engaging said boss and mounted for restrained lateral movement, and said drag assembly having a downwardly opening drain passage adjacent the axis thereof.

4c- In a centrifugal machine, a centrifugal bowl having a feed boss, a casing having an aperture, and a drag assembly having a downwardly extending drain passage, a nozzle in alinement with said boss, a shell having openings leading into said drain passage, and a. guide mounted in said shell for restrained lateral movement above said openings. 5. In a centrifugal machine, a casing having an aperture, a plug arranged in said aperture, a guide carried by said plug, a cam trifugal bowl having a feed boss extending into said guide, a member detachably secured to said plug and having a drainpassage and a feed conduit therein and a nozzle communicating with said feed conduit for directin into said boss substances fed through conduit, and means for connecting-said member to said plug at difierent rotational positilons of said member with respect to said p ug.

ing member into contact with said flange,

6. In a centrifugal machine, a casing hav- 7 and through, a guide carried by said plug and having an openin in substantial alinement with the opening m said plug, a'centrifugal bowl having a feed boss extending into said opening in said guide, and a member removably ipositioned in said opening in said plug aving a supply passage and a drain passage opening outwardly 1n the direction of the axis of said member.

7. In a centrifugal machine, a casing hav-' ing an internally threaded aperture, a threaded plug having an opening therein and ada ted to be screwed into said aperture to pro uce a tight fit with said casin a guide carried by said plug, a centrifugal owl having a feed boss extending into said guide, a

/ member having a feed conduit and a drain passage, and means for tightly fitting said member to said plug at different rotational ptl sitions of said member with respect to said u 8. In a centrifugal machine, a casing having' an internally threaded a erture, a threaded plug having an openin t erein and ada ted to be screwed into sai aperture to pro uce a tight fit with said casing), a guide carried by said plug, a centrifugal owl having a feed boss extendin into said guide, a member having a latera 1y opening supply conduit and an axially opening drain passage, andmeans for tightly fitting said member to said plug with the drain passage of said member in communication with the opening in said plug at different rotational ppsitions of said member with respect to said u p 9. In a centrifugal machine, a casing having an internally threaded aperture, a threaded plu having an opening therein and ada te to be screwed into said aperture to pro uce a tight fit with said casing, a guide carried by said plug, a centrifugal owl having a feed boss extending into said ide, a feeding and draining member fitting 1nto the opening in said plug, and means for fitting said member tightly to said plug at difierent I rotational positions of said member with respect to sa d plug.

- In testimony whereof, I have signed my name to this specigriation.

THUR U. AYRES.